194 Plants collected during a journey 



Hab. On the Canadian. 



Obs. This beautiful plant was first discovered in Mexico, 

 by Cavanilles. It appears to be but little known, and not to 

 have been seen by De Candolle. 



113. Cassia occidentals, Lin. Pursh fi. i. p. 305. 

 DC. prod. ii. p. 497. Sources of the Canadian. 



114. C. Cham.ecrista, Lin. Pursh jl.\. c. DC. prod. 

 ii. p. 503. On the Canadian. 



115. Cercis canadensis, Lin. Pursh fi. i. p. 308. DC. 

 prod. ii. p. 519. On the Canadian. 



ROSACEA. 



116. Prunus Chicasa, Michx.fi. i. p. 284. sub Ceraso. 

 Pursh fi. i. p. 331. Cerasus Chicasa, DC. prod. ii. p. 538. 

 On the Arkansa ; common. Truly indigenous. James. 



117. Spirjea opulifolia, L. Pursh fi. i. p. 342. DC. 

 prod. ii. p. 542. On the Missouri. 



118. S. Aruncus (3. americana, Michx.fi. i. p. 294. DC 

 prod. ii. p. 545. On the Missouri. 



119. S. monogyna, foliis lato-ovatis, subtrilobis, inciso- 

 serratis, glabris ; floribus corymboso-umbellatis, monogynis ; 

 pedicellis glabris ; calycis lobis erecto-patentibus, ovariis 

 villosis. 



Desc. Fruticose. Branches alternate, covered with a loose bark as 

 in S. opulifolia. Leaves roundish-ovate, broad and subcordate at the base, 

 somewhat 3-lobed, incisely toothed, slightly pubescent beneath, smooth 

 above; petioles without stipules. Umbels corymbose, few-flowered, on 

 short peduncles ; pedicels filiform, about half an inch long - . Flowers per- 

 fect. Calyx campanulate, 5-lobed ; lobes ovate-obtuse, somewhat spread- 

 ing 1 , pubescent. Petals — . Stamens 20 ; filaments inserted on a torus, 

 which is free at the margin. Germen solitary, stipitate, ovate, compressed, 

 villous, 3-seeded, acuminate with the persistent filiform style; stigma 

 small, capitate. 



Hab. On the Rocky Mountains. 



